Final answer:
To solve for Y when X = -9 in the equation y = 4x + 8, substitute -9 into the equation to get y = -36 + 8, which simplifies to y = -28. The correct answer is C) -28.
Step-by-step explanation:
To solve for Y when X = -9 in the equation y = 4x + 8, simply substitute -9 for x in the equation:
y = 4(-9) + 8
y = -36 + 8
y = -28
Therefore, the correct answer is C) -28.